Please take a look and help me and some suggestion please.

Look,I don't know what's wrong these days,my friend became very cold to me.She doesn't called up me,and she doesn't act normal when I call her.She is way too cold.And I recently got some sickness,I wish to tell her how am I now.I thought she would care.But I think she doesn't care any.It is too obvious the way she talk.What is this mean?I swear I did not do anything and say something bad behind or infront of her.Why is she becaming like that?I am really sad,and I don't know I should let go or not.We haven't talk like 2 or 3 weeks,I have inbox her and my words are quite hard.I am pissed cause I actually did not know what have I done.And I am really worried that next year's school life.

There is a point in the way she's acting that you have to consider whether she deserves the title, "friend." If you have to chase after someone to be your friend, it sounds like you are beyond that point. Find someone else that deserves the title.